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    <script>
        // 数组排序
        // 1.翻转数组
        var arr =['wangli','zuibang','fighting'];
        arr.reverse();
        console.log(arr);
        // 2.数组排序（冒泡排序）
        var arr1 =[3,13,4,7,77];
        arr1.sort(function(a,b){
            // return a - b;升序顺序排列
            return b - a;
        });
        console.log(arr1);
    </script>
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